Cavis Benz 7x12

Manticore

Manticore

Junior member
Anyone have any original late sixties/seventies Cavis fuel hose, 7x12. I have some NOS but not enough. Don't want the new manufactured stuff.
Just a note: I have hose from 1977, it is oiled and flexible and still in useable shape. It will go on the Jota.
 
I wuz gonna say that I think modern fuels make the Cavis Benz tubing turn hard and brown faster than petrol from the 70s, but I distinctly remember being really surprised the first time I saw a Laverda with new tubing, I'd never seen the blue colour before. And I bought my first one a lot less than a year old, in 1974, so Cavis Benz wasn't too good back then either.
The polyurethane stuff (from eBay) I use now also turns brown and hard in just a few months, but it doesn't cost $1 per INCH (Bevelheaven's price last time I looked) and gets petrol into my carburetors without leaks. Having an original bike is fine when you're selling it but when you're riding it daily (or at least on weekends)? Modern plastic stuff is what I'd use, save the Cavis Benz for when you're selling it and you put the worn-out Dellortos and Corte e Cossi pogo sticks back on too.

Ken
 
Ken,

Agree, the Cavis fuel line will discolor brown. My Ducati Darmah SS still wears the original Cavis fuel hose and Corte rear suspension and Brembo rubber brake line set-up. All still as good as it left Hexagon back in 1979.
I have NOS Cavis, but only in short lengths, I got this from a now defunct Italian dealership here in the UK, wish now that I had bought the lot.
Better news is I have managed to free the stood for 19 years Dell Orto's, I have seen seen so much varnish in a carb before, they are salvageable I think.

manticore
 
Agree, the Cavis fuel line will discolor brown. My Ducati Darmah SS still wears the original Cavis fuel hose and Corte rear suspension and Brembo rubber brake line set-up.
Click to expand...

Original brake lines? :o :o :o
 
Reggie3cl said:
Original brake lines? :o :o :o
Click to expand...

Probably quite OK for a static display bike... :D

I have found the fuel hoses discolour rapidly, no matter what quality hose or fuel I use.  When I first got my triple, the factory-fitted hoses had turned brown, but remained quite pliable for a while before I replaced them.  Import bikes from Italy often show reddish-coloured hoses, different fuels, resulting in different colours.

The most recent fitment, blue 7x12 from Ariete, turns to green after only a few days, not only discoloured but also went rock-hard within a matter of weeks and literally snapped off when I attempted to remove the tank for servicing.

I have found a source for 7x12 in a light green colour, will be fitting some to a mates bike shortly, can report back how it stands up in a couple of weeks/months.  Would make a more-than-handsome profit if I pass it on at 1$/inch!

piet
 
Just bought 10metres of Cavis, not sure if it is just the sub zero temperatures in the workshop but the stuff seems a lot harder than it ever used to be and it has yet to see any fuel, becomes nice and compliant with a bit of temperature but don't know how long it lasts in service as yet.


      Keith
 
I use that Parts Unlimited blue poly hose on  all my bikes. California fuels will turn anything brown in time, but that cavis benz stuff would brown and harden before you got around the block. I dont mind the browning as much as the hardening, the blue poly stuff seems to remain pliable even after browning, and you don,t have to use clamps...
 
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